Maintaining the SCCP

This describes how to monitor the DSPs and the subsystems to understand the running of the SCCP signaling links. In addition, you can enable or disable the DSPs and the subsystems if required.

Prerequisites

The LMT runs normally.
The communication between the LMT and the BSC is normal.
The GXPUM in the subrack where the DSP resides is functional.

Context

The SCCP can also perform routing and network management functions. The routing function is based on the address information such as the DSP and the Sub-System Number (SSN).
The subsystem number defined by the LMT is of the following types: 1, 1 (local), 254, and 254 (local). 1 and 1 (local) refers to the peer end and the local end of the SCCP management subsystem respectively. 254 and 254 (local) refers to the peer end and the local end of the SCCP service subsystem respectively.
You are prohibited to enable or disable the management subsystem. You can enable or disable only the service subsystem.

Procedure

Through GUI
1. Maintain the DSP.
  1. On the LMT, choose BSC Maintenance > Maintain Transmission and Signaling > Maintain SCCP.
  2. On the Destination Signaling Point tab page, set parameters in Location and Operation area, and then click Query. The query results are displayed, as shown in Figure 1.
    NOTE:
    OPC refers to Originating signaling Point Code.
    On the Destination Signaling Point tab page, select Query, Prohibit, or Allow from the Operation drop-down list. This topic takes the Query operation as an example.
    Figure 1 Querying the DSP
2. Maintain the subsystem.
  1. In the dialog box as shown in Figure 1, click the Subsystem Operation tab.
  2. Set parameters in the Location and Operation area and then click Query. The query results are displayed, as shown in Figure 2.
    Figure 2 Maintaining the subsystem
Through MML
1. You can run the following commands on the Local Maintenance Terminal to query the SCCP links.
  - Run the DSP SCCPSTATUSBTSP command to query the status of specified DPCs.
  - Run the DSP SCCPOSPDSPPAIR command to query the status of all DPCs.
  - Run the DSP SCCPSSN command to query the status of SCCP subsystem.